package servlet;

import java.io.IOException;
import java.io.PrintWriter;
import java.security.acl.Owner;
import java.util.ArrayList;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;

import com.google.gson.JsonObject;

import DB.CouchDB;
import DB.GroupAndUsersTableDB;
import DB.GroupTableDB;

public class DeleteUsers extends HttpServlet {

	/**
	 * Constructor of the object.
	 */
	public DeleteUsers() {
		super();
	}

	/**
	 * Destruction of the servlet. <br>
	 */
	public void destroy() {
		super.destroy(); // Just puts "destroy" string in log
		// Put your code here
	}

	/**
	 * The doGet method of the servlet. <br>
	 * 
	 * This method is called when a form has its tag value method equals to get.
	 * 
	 * @param request
	 *            the request send by the client to the server
	 * @param response
	 *            the response send by the server to the client
	 * @throws ServletException
	 *             if an error occurred
	 * @throws IOException
	 *             if an error occurred
	 */
	public void doGet(HttpServletRequest request, HttpServletResponse response)
			throws ServletException, IOException {

		doPost(request, response);
	}

	/**
	 * The doPost method of the servlet. <br>
	 * 
	 * This method is called when a form has its tag value method equals to
	 * post.
	 * 
	 * @param request
	 *            the request send by the client to the server
	 * @param response
	 *            the response send by the server to the client
	 * @throws ServletException
	 *             if an error occurred
	 * @throws IOException
	 *             if an error occurred
	 */
	public void doPost(HttpServletRequest request, HttpServletResponse response)
			throws ServletException, IOException {

		HttpSession session = request.getSession(true);
		String userID = (String) request.getAttribute("userID");
		String groupID = (String) session.getAttribute("group");
		String ownerID = (String) session.getAttribute("email");

		GroupTableDB groupTableDB = new GroupTableDB();
		JsonObject group = groupTableDB.selectGroupByID(groupID);
		// check if current user is the owner
		if (ownerID.equals(new GroupTableDB().selectGroupByID(groupID).get(
				GroupTableDB.OWNERCOL).getAsString())) {
			if (ownerID.equals(userID)) {
				JsonObject jsonObject = new JsonObject();
				jsonObject
						.addProperty("message",
								"Owners cannot delete yourself unless you delete the group!");
				response.setContentType("application/json");
				PrintWriter out = response.getWriter();
				out.print(jsonObject);
				out.flush();
				out.close();
			}else {
				GroupAndUsersTableDB groupAndUsersTableDB = new GroupAndUsersTableDB();
				groupAndUsersTableDB.deleteGroupAndUsers(userID, groupID);
				CouchDB db = new CouchDB();
				ArrayList<JsonObject> result = db.selectUsersByGroup(groupID);
				response.setContentType("application/json");
				PrintWriter out = response.getWriter();
				out.print(result);
				out.flush();
				out.close();
			} 
		} else {
			JsonObject jsonObject = new JsonObject();
			jsonObject.addProperty("message",
					"Only the owner can delete the member");
			response.setContentType("application/json");
			PrintWriter out = response.getWriter();
			out.print(jsonObject);
			out.flush();
			out.close();
		}

	}

	/**
	 * Initialization of the servlet. <br>
	 * 
	 * @throws ServletException
	 *             if an error occurs
	 */
	public void init() throws ServletException {
		// Put your code here
	}

}
